An interesting set of observations, but with an entirely incorrect conclusion, in my view.
Highly repetitive music & lyrics are something of a lowest-common-denominator. Corporate song-writing aims for the greatest appeal to the greatest number of people, to maximise sales. The problem is that it also creates boring music, because no specific quirk or detailed theme would appeal to the masses.
Although I would never argue that there is a one-dimensional good/bad scale in art, I do think that art worth consuming contains original and unexpected elements, and continues to be interesting when experienced many times. Homogenous, unchallenging content leads to cultural and personal stagnation.
A world where everyone is deeply engaged in a different niche subgenre is a better world than one where everyone is listening to the same permutations of half-a-dozen words.
